US3034648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Promoting froth flotation
Assignee: National Chemical Products Ltd
•
Filing: 1959-04-29
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Granted: 1962-05-15
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Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 Powell Roger Frederick
- 👤 Martin Eric Francis
- 👤 Lurie Julian
- 👤 Nichol Robert James
- 👤 Brand Ernst Marais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/0043; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
IN FROTH FLOTATION OF MINERAL ORE WITH THE ACID OF A PROMOTER, THE ADDITION TO THE FROTH FLOTATION MEDIUM OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
25 words
IN FROTH FLOTATION OF MINERAL ORE WITH THE ACID OF A PROMOTER, THE ADDITION TO THE FROTH FLOTATION MEDIUM OF A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2347447A
Cited
US2561251A
Cited
US2465489A
Cited
US2770654A
Cited
US2904177A
Cited
US2901107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |